Trying to lend a hand for a good cause has turned tragic for some firefighters in Kentucky.

Four firefighters were injured, one of whom is in critical condition, after the firetruck being used to help some university students with their ALS Ice Bucket Challenge video came too close to some power lines, according to a report in the Central Kentucky News-Journal.

A Campbellsville Fire & Rescue ladder truck was being used to help band members from Campbellsville University on Thursday morning with their video for the ALS Ice Bucket Challenge. The Firefighters were getting the truck ready to leave the campus after the challenge was over when the accident happened.

Two firefighters in the bucket portion atop the ladder were moving the ladder back down when it came within a few feet of some power lines, which causes an electric arc to jump from the line to the firefighters in the bucket. Those two, identified by Campbellsville Police Chief Tim Hazlette as Tony Grider, 41, and Alex Quinn, 22, suffered burns and were airlifted to a nearby hospital. Grider was listed in critical condition, and Quinn was in fair condition. Two other firefighters were injured after touching the electrified firetruck immediately after the incident, but were treated and released, according to the News-Journal.

The challenge has been sweeping social-media in recent weeks. People record video of them having cold water dumped over their bodies and then challenge others to do the same or donate money to the group searching for a cure for ALS, also known as Lou Gehrig's disease. There have been several videos of the challenge going awry, with buckets hitting people on their heads and other mishaps, but for the most part it's been an effective marketing campaign that has raised more than $100,000 for ALS research.

What do Lady Gaga, Illinois Gov. Pat Quinn and the cast of "Grey's Anatomy" have in common? They've all dumped buckets of ice water over their heads in the name of ending a deadly neurodegenerative disease. You could be next.

As of Monday, the ice bucket challenge had raised more than $15.6 million...

What do Lady Gaga, Illinois Gov. Pat Quinn and the cast of "Grey's Anatomy" have in common? They've all dumped buckets of ice water over their heads in the name of ending a deadly neurodegenerative disease. You could be next.

As of Monday, the ice bucket challenge had raised more than $15.6 million...

The Christian-based Campbell University Facebook page shows students on campus holding prayer vigils Thursday night after the accident, and the timeline follows the events in an eerie fashion with this posting from 1 p.m. Thursday:

"Electricity is out across campus. We'll update with more information as it becomes available."

followed by...

"No CU students have been injured. Reports say two firefighters were, however. Please keep them & their families in your thoughts and prayers."